{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "img_f = open(\"img/199703153_img.jpg\", \"rb\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "a = img_f.read()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "49920"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "len(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "b'\\xff\\xd8\\xff\\xe1\\x00\\x18Exif\\x00\\x00II*\\x00\\x08\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\xff\\xec\\x00\\x11Ducky\\x00\\x01\\x00\\x04\\x00\\x00\\x00P\\x00\\x00\\xff\\xe1\\x03\\xe2http://ns.adobe.com/xap/1.0/\\x00<?xpacket begin=\"\\xef\\xbb\\xbf\" id=\"W5M0MpCehiHzreSzNTczkc9d\"?> <x:xmpmeta xmlns:x=\"adobe:ns:meta/\" x:xmptk=\"Adobe XMP Core 5.3-c011 66.145661, 2012/02/06-14:56:27        \"> <rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"> <rdf:Description rdf:about=\"\" xmlns:xmpRights=\"http://ns.adobe.com/xap/1.0/rights/\" xmlns:xmpMM=\"http://ns.adobe.com/xap/1.0/mm/\" xmlns:stRef=\"http://ns.adobe.com/xap/1.0/sType/ResourceRef#\" xmlns:xmp=\"http://ns.adobe.com/xap/1.0/\" xmpRights:Marked=\"False\" xmpMM:OriginalDocumentID=\"adobe:docid:photoshop:765fccf9-4a75-11de-9125-a91a99d1246d\" xmpMM:DocumentID=\"xmp.did:D271FBF35AF311E6BC51F66A7AF6394C\" xmpMM:InstanceID=\"xmp.iid:D271FBF25AF311E6BC51F66A7AF6394C\" xmp:CreatorTool=\"Adobe Photoshop CS6 (Windows)\"> <xmpMM:DerivedFrom stRef:instanceID=\"xmp.iid:C0FE33D2F35AE611A3F8AF06721704FE\" stRef:documentID=\"adobe:docid:photoshop:765fccf9-4a75-11de-9125-a91a99d1246d\"/> </rdf:Description> </rdf:RDF> </x:xmpmeta> '"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a[:1024]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "49"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "int(len(a)/1024)+1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "50176"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "49*1024"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "49152"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "48*1024"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "768"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "len(a)-48*1024"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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